With the recent introduction of the lower priced Ruko RID module, the Holy Stone RID module is now being sold for only $41.99 here on Amazon. And if you’re an Amazon prime member, you’ll also get free same-day or one-day shipping.
Holy Stone normally sells their RID module for between $60 - $90 (depending on where you shop). So, this is a great buy if you're in need of an RID module and have been eyeing up the Holy Stone RID module specifically.